Automatic pencil.



0. L. HARRISON.

AUTOMATIC PENCIL.

API'LIOATIOH Hum mum, 1905.

2 SHEETS-SHEET 1.

fjwveutoz 0. A. Harri son Patented Oct. 27, 1908.

Wit eases C7 OWEN L. HARRISON, OF OOLETA, ILLINOIS.

AUTOMATIC PENCIL;

I Specification of Letters Patent.

Patented Oct. 27, 1908.

Application filed February 4, 1907. Serial No. 355,713.

To all whom 'it may concern:

Be it known that I, OWEN L. HARRISON, a citizen of the United States, residing at Coleta, in the county of Whiteside and State of Illinois, have invented a new and useful Automatic Pencil; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The invention relates to pencils, and has for its object to provide a simple inexpensive and durable device of this character in which the lead can be entirely used without bringing into use a sharpener.

With these and other objects in view, the invention consists in the novel construction and arrangement of parts, hereinafter described and shown and particularly pointed in the appended claims.

In the drawing forming part of the specification, and in which like numeralsof reference indicate corresponding parts, Figure 1 is a pers ective view of a pencil constructed in accor ance with this invention. Fig. 2 is a longitudinal sectional view through the same. Fig. 3 is a side elevation of the receding tube. Fig. 4 is a plan view of the adjusting nut. Fig. 5 is a transverse sectional view taken through the entire device. Fig. 6 is a longitudinal sectional view showing a modified form of the device. Fi 7 is a detail view of the nut 7, showing t 1e aperture in which the ton ue 9 is mounted.

Referring to t e drawings, 1 designates a casing of my pencil which is made of any hard suitable material and is provided on its interior with screw threads 2, and having ends or caps 3 and 4, which engage said screw threads. Mounted in this casing is an adjustable tube 5 in which is inserted the lead or marking. substance 6. The screw threads 2 are also engaged by a threaded nut 7, which is rovided with an aperture 8, through which the tube passes. The nut 7 is provided with a tongue 9 which extends across this a erture and which engages a slot 10 in the tu e 5.

The lead which is mounted in the tube 5, presses directl a ainst the tongue 9, which prevents said ea from yielding or recedin when the same is being written with. It be seen that the tube 5, extends entirely through the device and projects beyond the same at each end. When the device is being used, as the lead wears off, the tube 5, will come in contact with the aper that is being written upon and as the ead is firmly held against movement by the ton ue 9, when the tubetouches the paper it wil naturally recede, as the only thingwhich holds the tube against movement is a rubber lug 13, which engages said tube, as shown in ig. 5.

When the end of the tube 5 has receded u to the ca 3, the tube 5 is then rotated which moves t e nut toward the ca 3 and thus makes more of the lead availab e for writing. The tongue in the nut 7 has a double function, that of causing the rotation of the nut and of holding the wire against the lead.

The nut 7 is provided with a screw threaded aperture which receives a screw 12. Interposed between the screw 12 and the aperture 8, is a rubber plug 13, which frictionally engages the tube 5 and prevents the same from moving too freely, as will be readily understood. Instead of rubber, a spring may be used if desired. The tube 5 is provided with washers 14 and 15 which engage the outward ends of the caps by which said tube is revented from falling out. The lead 6 is ield in place by means of a rubber plug 16, which frlctionally engages the same, near the end of said tube. The plug 16 is mounted in a suitable recess and 1s held in place by means of a band 17.

In Flg. 6 of the drawings, a modified form of the invention is shown, the lead 6, instead of resting against the tongue, is engaged by a wire 19, one end of which is mounted in the casing 1, and the other end enters the tube 5. The tube 5 is frictionally held in engagement with the handle or easing 1 by means of a rubber plug 20.

It will be seen that as the lead wears off and the nut is rotated toward the portion 3, that it will not be necessary to screw the nut again back towards the portion 4 when a new lead is put in, but the new lead can be placed in the opposite end of the tube, which thus removes the necessity of screwing the nut from one end of the casing to the other, both ends of the tube being exactly alike.

What is claimed is: I

1. A device of the class described embracing a casing, a slidable metallic tube mounted in said casing, a marking lead mounted in said tube and capable of adjustment therein, said tube having a recess, a frictional plug mounted in said recess, a removable cap desired osition.

2. A evice of the class described, embrac.

ing a casing, a slidable metallic tube mounted in said casing, a slidable marking lead mounted in said tube and capable of adjustment therein, said tube having a recess, a frictional plug mounted in said recess, a removable ca adapted to shield said plu said lug bein ea able of holding said slid able ead in tie esired position, and frictional means for holding said tube in its adjusted position. 1

3. A writing instrument comprising a casing, a revolving nut mounted in said casing, a longitudinal tube extending through said casing and piercing said nut, a lead carried by said tublng, said tube being adapted to recedc, and means arranged in said tube for holding said lead against casual movement.-

4. A device of the class described, comprising a casin screw threaded ca s mounted in each end thereof, a revolub e nut arranged in said casing, a slotted tube adjustably mounted in said caps and piercing said rcvoluble nut, marking substance mounted in said tube, a tongue formed in said nut and adapted to engage said slot, and means mounted in said nut for frictionally engaging said tube. V

5. A writing instrument, consisting of a handle having a tube mounted therein, said tube having lead mounted therein and a rubber plug mounted in said tube for holding said lead against movement, and a nut mounted in said handle and adapted to engage said tube and having means mounted in said nut for reventing the lead from receding, substantially as described.

, '6. A device of the class described, comprising a casing, a slidable tube mounted in said casing, said tube being'provided with markin material, capable of adjustment in said tu c, said tube having a recess, frictional material mounted in said recess, for holding said marking material in its adjusted position, and a removable cap, adapted to shield said frictional material, substantially as described.

7. A device of the class described, comprising a casing, a lead carrying tube mounted in said casing, said tube being provided with a slot and a lead, a tongue adapted to engage said slot for holding said lead a'gainst receding, said tongue bein adapted to engage the lead with either si e.

8. A writing instrument comprising a casing, a revolving nut mounted in said casing, a longitudinal tube extending through said casing and piercing said nut, said tube being slidable and capable of receiving lead in either end thereof, said nut being rovided with a tongue for holding said lea against receding, substantially as described.

9. A writing instrument comprising a casing, a slidable tube mounted in said casing, a slidable marking lead mounted in said tube,

' frictional means for holding said tube against casual movement, frictional means for holding said marking lead against falling out, and a backing for said lead mounted in said casing, said backing being adjustable in its relation to 'said lead and said tube.

In testimony whereof I have signed my name to this specification in the two subscribing witnesses.

OWEN L. HARRISON.

presence of 

